The California Homicide Investigators Association (CHIA) is a non-profit organization that was formed in 1968 when homicide detectives from Los Angeles and San Francisco met over dinner to discuss the Zodiac Killer investigation. This simple dinner gathering grew into what is now the largest organization of homicide and death investigation professionals in the United States. Since its inception, the CHIA membership has grown to over 3,000 members that include law enforcement representatives from all over the United States and Canada.